AMD Ryzen 7 8840HX vs Intel Core 7 251E Comparison

Where Each One Wins

The AMD Ryzen 7 8840HX and Intel Core 7 251E occupy different positions in the database, and their benchmark profiles reflect that split. The AMD part has a full set of recorded measurements across 13 tests, while the Intel part currently has no benchmark entries in the database. This means the direct comparison relies on the AMD processor's measured results and the Intel processor's architectural specifications.

The AMD Ryzen 7 8840HX delivers strong multi-threaded performance. Its Cinebench R23 multicore score of 25265 places it in the 94th percentile of all CPUs in the database. The single-core Cinebench R23 result of 1857 confirms that it also handles lightly threaded workloads well. PassMark single-thread testing shows 3958 points, which aligns with a mobile processor designed for sustained high boost clocks up to 5.10 GHz.

The Intel Core 7 251E has no recorded benchmark scores, so its wins cannot be quantified from measured data. What the database does show is its configuration: 24 cores and 32 threads, a boost clock of 5.60 GHz, and a TDP of 65 W. These specifications suggest strong potential in multi-threaded environments, but without recorded results, the database cannot confirm actual performance.

The AMD processor wins in the measurable categories because it is the only one of the two with benchmark data. Its PassMark multithread score of 41732, integer math score of 146506, and floating point math score of 86747 all indicate robust throughput across varied workloads. Data compression at 496427 and extended instructions at 36527 further demonstrate its capability in specialized tasks.

Architecture Differences

The two processors come from different design philosophies and manufacturing processes. The AMD Ryzen 7 8840HX uses the Zen 4 architecture on the Dragon Range codename, built on a 5 nm process at TSMC. It packs 13,140 million transistors across a dual-chiplet design with a die size of 2x 71 mm². The Intel Core 7 251E uses the Bartlett Lake codename on a 10 nm process at Intel, with a die size of 257 mm². These process differences are substantial: the 5 nm node allows AMD to fit more transistors in a smaller area, while Intel's 10 nm part uses a monolithic die.

Core counts differ significantly. The AMD chip has 12 cores and 24 threads, while the Intel chip has 24 cores and 32 threads. The Intel part offers double the core count but only 8 additional threads, indicating that not all of its cores support simultaneous multithreading. Cache hierarchies also diverge. AMD uses 64 KB of L1 cache per core, 1 MB of L2 per core, and 64 MB of shared L3 cache. Intel uses 80 KB of L1 per core, 2 MB of L2 per core, and 36 MB of shared L3 cache. The AMD processor's larger L3 cache (64 MB versus 36 MB) benefits workloads with large working sets, while Intel's larger per-core L1 and L2 caches serve individual core performance.

Clock speeds tell a mixed story. The AMD part has a base clock of 2.90 GHz and a boost clock of 5.10 GHz. The Intel part has a lower base clock of 2.10 GHz but a higher boost clock of 5.60 GHz. The Intel chip also carries a higher TDP of 65 W versus AMD's 55 W, which suggests more sustained power delivery for heavy loads.

Memory support differs as well. The AMD processor supports dual-channel DDR5 with a bandwidth of 83.2 GB/s. The Intel processor supports both DDR4 and DDR5, also dual-channel, with a bandwidth of 89.6 GB/s. Intel's part adds ECC memory support, which AMD lacks. PCIe connectivity favors AMD: Gen 5 with 28 lanes (CPU only) versus Intel's Gen 5 with 16 lanes (CPU only). Integrated graphics also differ, with AMD using Radeon 610M and Intel using UHD Graphics 770.

The Intel processor has a launch MSRP of $384. The AMD processor has no launch MSRP recorded in the database. The AMD part has an unlocked multiplier, while the Intel part is locked. The AMD processor targets the mobile segment on AMD Socket FL1, while the Intel processor targets the desktop segment on Intel Socket 1700. Release dates also differ: the Intel part launched on 2025-01-12, and the AMD part on 2025-04-22.

The Verdict

The data supports a clear distinction based on segment and usage. The AMD Ryzen 7 8840HX is a mobile processor with measured performance in the 94th percentile of all CPUs. Its 12-core, 24-thread configuration with a 5.10 GHz boost clock and 64 MB of L3 cache delivers strong results across the recorded benchmarks. Its average benchmark score of 71797 places it within 0.8% of several Intel Xeon server processors, including the Xeon 6724P at 72396 and the Xeon 6517P at 72350. It trails the Intel Core Ultra 7 265KF by only 0.2% (71910 versus 71797) and beats the Intel Xeon Platinum 8270 by 0.6% (71797 versus 71370).

The Intel Core 7 251E has no benchmark results in the database. Its average benchmark score is recorded as 0, and it holds the 50th percentile among all CPUs based on specifications alone. Its 24 cores and 32 threads, higher boost clock of 5.60 GHz, and ECC memory support make it a plausible choice for desktop workloads that need many cores, but the database cannot verify its performance without measurements.

For users who need a mobile processor with confirmed high-end performance, the AMD Ryzen 7 8840HX is the only option with data to support it. For users considering a desktop processor with a larger core count and ECC support, the Intel Core 7 251E offers those specifications, but its actual benchmark standing remains unverified in the database. The AMD part's unlocked multiplier adds flexibility for overclocking, while the Intel part's locked multiplier does not.

FAQ

Q: How does the AMD Ryzen 7 8840HX compare to its nearest rivals in average benchmark score?

A: The AMD Ryzen 7 8840HX has an average benchmark score of 71797. It is 0.2% behind the Intel Core Ultra 7 265KF (71910), 0.6% ahead of the Intel Xeon Platinum 8270 (71370), 0.8% behind the Intel Xeon 6517P (72350), and 0.8% behind the Intel Xeon 6724P (72396).

Q: What are the core and thread counts for each processor?

A: The AMD Ryzen 7 8840HX has 12 cores and 24 threads. The Intel Core 7 251E has 24 cores and 32 threads.

Q: Which processor supports ECC memory?

A: The Intel Core 7 251E supports ECC memory. The AMD Ryzen 7 8840HX does not support ECC memory.

Q: What is the process node for each processor?

A: The AMD Ryzen 7 8840HX is built on a 5 nm process at TSMC. The Intel Core 7 251E is built on a 10 nm process at Intel.

Q: What is the boost clock of each processor?

A: The AMD Ryzen 7 8840HX has a boost clock of 5.10 GHz. The Intel Core 7 251E has a boost clock of 5.60 GHz.

Q: What is the launch MSRP of the Intel Core 7 251E?

A: The Intel Core 7 251E has a launch MSRP of $384. The AMD Ryzen 7 8840HX has no launch MSRP recorded in the database.

Head-to-Head Benchmarks

The head-to-head benchmark list is empty, so the comparison relies on the AMD processor's recorded scores and the Intel processor's specifications. The AMD Ryzen 7 8840HX delivers a Cinebench R23 multicore score of 25265, which reflects its 12-core, 24-thread design. Its single-core Cinebench R23 score of 1857 shows that per-thread performance is also competitive. These numbers place the AMD part in the 94th percentile of all CPUs.

PassMark results for the AMD processor cover a range of workloads. The multithread score of 41732 and single-thread score of 3958 establish a baseline for general performance. Integer math scores 146506, floating point math scores 86747, and extended instructions score 36527. Data compression reaches 496427, data encryption scores 29919, and random string sorting hits 57971. Physics testing scores 2185, and prime number finding scores 304.

The Intel Core 7 251E has no recorded scores in any of these tests. Its specifications suggest it could compete in multi-threaded workloads: 24 cores, 32 threads, and a 5.60 GHz boost clock with a 65 W TDP. Its 89.6 GB/s memory bandwidth slightly exceeds the AMD part's 83.2 GB/s. However, the AMD processor has more PCIe lanes (28 versus 16) and a larger L3 cache (64 MB versus 36 MB). The AMD part also has a higher base clock (2.90 GHz versus 2.10 GHz), which can benefit sustained all-core loads.

The AMD processor's average benchmark score of 71797 puts it in close company with several Intel Xeon server parts. The Intel Core Ultra 7 265KF scores 71910, a 0.2% advantage over the AMD chip. The Intel Xeon Platinum 8270 scores 71370, a 0.6% deficit. The Intel Xeon 6517P scores 72350 and the Intel Xeon 6724P scores 72396, each 0.8% ahead of the AMD part. These deltas are small, indicating that the AMD mobile processor performs at a level comparable to enterprise server silicon in aggregate scoring.

The Intel Core 7 251E, with an average benchmark score of 0 and no rivals listed, cannot be placed on this scale. The database records its percentile as 50, which is a specification-based estimate rather than a measured result. Until benchmark data is recorded for the Intel part, the AMD Ryzen 7 8840HX remains the only one of the two with verified performance metrics. The AMD chip's 94th percentile ranking, measured across its full benchmark suite, gives it a definitive edge in the recorded data.